Walmart Categories API

List one level of Walmart's category tree, and turn a category id into one Browse accepts.

GET | POST /v1/walmart/categories

Send parameters as a query string with GET, or as a JSON body with POST. Both are equivalent.

Request

curl "https://gateway.apinoa.com/v1/walmart/categories" \
  -H "x-api-key: $APINOA_API_KEY"

Parameters

Parameter	Type	Required	Notes
`categoryId`	string		Omit for the 42 departments; give a bare department id (`4171`) or an underscore chain to list that category's children. Unlike `browse`, a bare id is accepted here — descending from one is how a client reaches the chains `browse` takes.
`region`	string		Buyer country as ISO 3166-1 alpha-2; sets availability, shipping and price.

The same parameters, and every response type, are in the OpenAPI document.

Response

Returns CategoryList in data. A real response, shortened: arrays keep their first entries and long text is cut.

{
  "success": true,
  "data": {
    "marketplace": "walmart",
    "path": [],
    "categories": [
      {
        "id": "1334134",
        "name": "Arts Crafts & Sewing",
        "browsable": true
      },
      {
        "id": "91083",
        "name": "Auto & Tires",
        "browsable": false
      }
    ]
  }
}

Errors

Status	Code	Meaning
400	`INVALID_PARAMS`	A parameter is missing, unknown or out of range. The message names it.
401	`UNAUTHORIZED`	The `x-api-key` header is missing, or the key is revoked or unknown.
402	`INSUFFICIENT_BALANCE`	The balance does not cover this call. Top up in the dashboard.
429	`MARKETPLACE_SATURATED`	Too many concurrent calls. Retry after the `Retry-After` seconds.
502	`UPSTREAM_ERROR`	The platform answered with something unusable. Retry with backoff.

Every code is listed in Errors. Failed calls are not billed.

Pricing

Price $0.001 per call, plus $0.001 for each extra call it makes — at most 1 more, so $0.002 in total. List price; the rate steps down above 1,000 calls a day.

Notes

Omit categoryId for the 42 departments. Pass one to list its children.
Children come back as chains (4171_4186), which Search and Browse both accept. A bare department id (4171) works in both too: Browse lists every product in the department.
Departments do not report browsable. Every department can be browsed; its children narrow the listing.

Categories